1. The scientific name of the largest octopus known to science is Octopusapollyon, and its Chinese name is North Pacific giant octopus. It lives near the coasts of the North Pacific waters, hence the name North Pacific giant octopus. The average length of the North Pacific giant octopus exceeds 3.68 meters when its arms are extended, and its weight is 24.95 kilograms. On February 18, 1873, an extremely large octopus was caught at the mouth of Hood Canal under Puget Sound, Washington State. When its arms are naturally extended, its body is 7 meters long and weighs 53.81 kilograms.

2. The North Pacific giant octopus (scientific name: Enteroctopusdofleini), also known as the North Pacific giant octopus, is a giant octopus. They are distributed on the coast of the North Pacific at a depth of 65 meters, and can also be walked They live in places with shallower or deeper water. Because individuals weighing 71 kilograms have been found, it is said that they are the largest octopus. In addition, some people think that the seven-armed octopus is the largest octopus, because the body of the seven-armed octopus has been found weighing 61 kilograms, and it is estimated that the living body can weigh 75 kilograms. However, there are still many records indicating that the North Pacific giant octopus may be the largest.

3. The male seven-armed octopus’ hand-over wrist is rolled up under the right eye, hence its name. Because they have thick gel-like tissue, the hand-over wrist is often ignored. It's like it has seven arms. The fact is that they, like other octopuses, have eight arms. The type specimen of the seven-armed octopus was found in the Atlantic Ocean and has been deposited at the University of Copenhagen. In New Zealand in 2002, a seven-armed octopus was caught in a trawl by a fishing boat. This was the first time they had been found in the South Pacific. Its outer membrane sleeve is 0.69 meters long, with a total length of 2.9 meters and a weight of 61 kilograms.